A balanced equation has . 1.the same number of each kind of atom on both sides of the equation

2.the same total number of coefficients on both sides of the equation

3.the same number of reactants as products

4.an equal number of molecules on both sides of the equation

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean